期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2017
卷号：5
期号：3
页码：6255
DOI：10.15680/IJIRCCE.2017.0503395
出版社：S&S Publications
摘要：The proposed system is developed with the help of microcontroller PIC16 which acquire data fromsensors. Microcontrollers are connected in single master multi-slaves mode for communication. Master acquires datafrom slave’s networks with the help of Protocol called MODBUS/RTU and the physical medium RS 485.The data istransmitted through CAT-6 cable. Only one device (i.e. the master) can initiate communication. The other devices (i.e.slaves) respond to the masters communication messages. They either send back the requested data or perform therequested operation. The master can talk with individual slave units (unicast message) or all slave units at one time (i.e.broadcast messages). Regardless of the transmission 'mode' RTUthe communication cycle and contents remains thesame. The data to be stored are available in values of the slave registries MODBUS in MODBUS network. Anyinstrument be it an indicator, a controller, a sensor, and others, can be considered a slave on the network since it hasavailable a MODBUS/RTU communication port.
